It takes some effort on your own part IMO. I don't think I would roll very well just sitting in front of a computer. I want lights, music, massages, conversations. And more lights.
There's some truth to this actually. . . While I can certainly enjoy the experience alone just chillin in front of my comp or w/e it's certainly not a really powerful trip. . .
For me it's all wrapped in in the experience. The lights, the massages, the touch of my girl, the music, the feel, the flow. . . it all becomes seamless. It all becomes one long continuous amazing full body orgasm with every fiber of who and what I am ebbing and flowing with the beat illuminated by the pulsating lights and swirling and convalescing in rhythm with my girl until our bodies, minds, and spirits, join together soaring over around and through the clouds.
The truth is NO ONE will every really be able to describe it for you. I have tried many many times to write or describe it to someone and Always no matter how pretty my words it's never quite right. . . it's always shallow and hallow compared to the real experience. They always tell me that I undersold it and it was more amazing than they expected.
In your case I really don't know the answer why you haven't experienced it however I would hazard a few guesses:
1. test test test. I don't mean to sound like a dick but you say you know it was good MDMA but you don't. Unless you or someone you trust tested it you just don't. I cant tell you how many people I know that still swear to me good MDMA has heroine in it. People (in general) are NOT as educated as they may want you to believe. They might tell you it's good MDMA because they THINK it's good MDMA but in reality neither party may have a clue. . . Unless tested PLEASE don't assume anything no matter who tells you. TEST TEST TEST. . .
2. Look into Dosage as well as administration. Full stomach / Empty? Any Medications? Any other substance use? If so when/how much? How was your drug administered? How much? If you really did have pure product 100-200 mg should have done the trick for you. . . seriously.
3. How long since your last roll. . . this is a BIGGIE!!! Take TIME!!! Lot's of time in between. LOTS of people don't respect this advice but it's undeniable true. Try taking a YEAR (yes a YEAR) off from ALL substances while eating a healthy diet and living a healthy life. . . then try it. . . I would BET (obviously I can't garuntee but i'd bet) that you'll notice a DRAMATIC increase in effect.
4. Finally and you may not put any stock in this but I certainly do. . . you set and setting. Music, lights, toys, partners . . . Basically you're looking to be in a certain "mood" prior to rolling so the roll will blow up that mood. . . You want to be happy, fufilled, energetic (I can't think of a better word but not like AMPED but full of life), Ready, Open . . .
IMHO mindset is pretty key. . . if you focus on negative and diminished effects you can will that into reality to an extent. Mind over matter and all that jazz. . . You can THINK and WILL yourself right out of a good roll without even meaning too. You want to relax, open yourself, let loose and ride the wave. . . (I'm not really sure how to put this whole concept in words exactly but this is as close as I can think to come)
If all else fails it's possible First Bad Comedown is correct. Every human is unique and while MDMA is generally considered as relatively safe with responsible usages NO DRUG is entirely safe all the time for everyone. That's just not the way things work. Hell people can even be allergic to water touching their skin!!!